Jeweler's Saw Blades #4/0 Size (Dozen) Relentless Saw Blades are manufactured in Switzerland from the highest quality steel. Electronically tempered to be more flexible than other brands, Relentless Saw Blades feature perfectly angled teeth for straight, uniform cuts every time Long lasting and fast cutting, Relentless guarantees quality in every blade. Use this #4/0 size blade when cutting finely detailed patterns in sheet. Cutting edge: #4/0 - Blade Thickness: .44mm - Teeth Per Inch: 66